Dust-guard.



No. 815,000. A PATBNTBD MAR. 13, 1900.

' G. A. WooDMAN.

DUST GUARD. f PPLIoAjrIoN FILED MAR. 0,'1905 2 SHEETS-SHEET z.

' on the journal. A

To all whom tim/ay concern,.-

UNITED sTATEs PATENT OEE-TOE.

GEORGE ALvEEADo WOODMAN, OE CHICAGO, iLLiNois i DUST-GUARD.

Specification of Letters Patent.

Patented March 13, 1906.

Application filed March 9 1905` Serial No. 249,198.

Be it known that I, GEORGE ALVEEADO WOODMAN, a citizen of the United States, re-

siding at Chicago, in the county of Cook and stantly maintaining a close fit against the box and on the journal and automatically adjust itself thereto as it becomes worn in actual use.

A further object of the invention is to makea metal dust-guard which will automatically adjust itself to maintain a close fit jI have illustrated one embodiment of the invention in the accompanying drawings, in 4 which- Figure 1 is aperspective view of a journalbox with my improved dust-guard applied Fig. 2 is a sectional view on the line- Fig. 4 is a plan view of the packing-ring.

Fig..5 is an edge view of the packing-ring.

Fig, 6 is a sectional view on the line 6 6 of Fig. 2.

Referring to the drawings, 10 desi nates a ljournal-box which is selected simply or illustrative purposes to show the a plication of my-invention, and it will be un erstood that I may use the dust-guardin connection with various types of journal-boxes with such changes and alterations as may be necessary or desirable to suit the particular box.

The dust-guard comprises a divided packing-ring 11 and a clamping member 12, by which the packing-ring is securely fastened in lace on the journal and against the back The packing-ring is made en 13 of the box. of a size to fit the journal, and the clamping member is made in the form of a'plate with provided with'an opening 14 for the journal. For the purpose of automatically adjustin the ring to maintain a close fit on the journal at all times the clamping-plate isprovided with one or more studs 16, which arel arranged to operate against eccentric bearings on the packing-ring. In the drawings I have shown two'studs oppositely disposed on the clamping-plate and two correspondingly-` disposed bearings on the ring; but this is not an arbitrary number, and I mayuse more or less if desired. Each bearing is formed by a depression 17 in the side of the ring, and this depression is wider and deeper at one end 18 than at its other end 19, Where it merges into the flat side of the ring. The inner wall 20 of the bearing is eccentric to the center of the ring, and the bottom of the depression is eccentric to the thickness of the ring.

The clamping-plate is provided with outi wardly-extending ears 21, having forwardly- .projecting lugs 22 to enter openings 23 in the ears 24 on the box. The clamping-plate is secured to the box by Cotter-pins 25 in the ends of the lugs. cups 27 on the ears 24, bear constantlyu on the lugs 22 and impart to the clamping-p ate a constant tendency to rotate slightly in a direction which will cause the studs to ride up the inclined bottom and against the inner `eccentric wall of the bearings of the packingring. After the dust-guard is once applied it requires vno attention, for the clamping-platel is constantly under tension of the springs, which gives it a rotatable movement relative to the ring and causes it to automatically tighten the packing-ring on the journal as it wears. c

When the clamping-plate is in place, the ystuds bear against the bottom ofthe bearings and a ainst the eccentric inner walls thereof, an hence it will be readily understood that as the clamping-plate is turned by the action ofthe springs the studs will ride up on the bottom and forward against the eccentric inner wall of the bearings and not only clamp the ring tightly against the back end of the box, but also tighten the it on the journal,\this double adjustment being automatically and simultaneously effected. Thisv provides for a constant it of the packingsing against the box'and the journal with sufficent tightness to prevent the entrance of dust and dirt into the box. While the springs induce only` a comparatively slight rotatory movement of the clamping member, 'it will be sufficient to automatically maintain a close and effective fit of the ring against the box and on the journal.

The'invention is simple in construction,

can be manufactured at a low cost, and can be easily and readily applied. By reason of the fact that it can be made entirely of metal it will last a long time in actual service, and hence the cost ofmaintenance is greatly re- Springs 26, arranged in IIC duced. have shown the ring divided at only one point; but I may divide the ring into two or more sections, ii' desired. The ring will ordinarily be prevented from turning on the journal by frictional engagement with the back end of the box g but as a further precaution against it turning I may provide the ring with a pin 28, Figs. 2, 5, to iit in an opening 29 in the box or otherwise lock the ring in some simple manner against turning. It will be readily understood that if the ring is prevented from turning, whether by friction or -by the pin and opening 28 29, one bearing and one stud (those at the bottom of the ring and plate, for example) will be suilicient to obtain the desired clamping action. The Cotter-pins hold the clamping-plate securely in place against the back end of the box and prevent it from working back on the journal.

Without limiting myself `to the exact construction and arrangement of parts herein shown and described, what I claim, and desire to secure by Letters Patent, is-

1. A dust-guard for car journal-boxes comprising a divided ring to encircle the journal, and means having a constant tendency to rotate relative to the ring and concentric therewith for tightening the ring on the journal.

2. A dust-guard for car journal-boxes comprising a divided ring to encircle the journal, and spring-actuated. means rotatable relative to the ring and concentric therewith to draw the ends thereoi1 toward each other and exert a constantlyetightening action of the ring on the journal.

3. A dust-guard forear journal-boxes comprising a divided ring to encircle the journal, and spring-actuated means rotatable relative to the ring and concentric therewith for clamping the ring with a constantly-tighten ing action against the back end of the box.

4. A dust-guard for car journal-boxes comprising a divided ring to encircle the journal, and means having a constant tendency to rotate relative to the ring and concentric with the ring for simultaneously tightening the ring on the journal and clamping the ring against the back end of the box.

5. A dust-guard for car journal-boxes comprising a divided ring to encircle the journal, and means having a constant tendency to rotate relative to the ring for simultaneously tightening the ring on the journal and clamping the ring against the back end of' the box.

6. A dust-guard for car journal-boxes comprising a divided ring to encircle the journal, a clamping member rotatable relative to the ring for tightening the ring on the journal and clamping the ring against the back end of the box, and means operating on the clamping member for continuously imparting a rotatory movement thereto to thereby exert a constant tightening and clamping action on the ring.

7. A dust-guard for car journal-boxes comprising a divided ring to encircle the journal, there being an eccentric bearing on said ring, and a clamping member rotatable relative to the ring, there being a part on said member arranged to operate in said bearing to clamp the ring on the journal and against the back end of the box.

8. A dust-guard for car journahboxes com prising a packing-ring to encircle the journal, there being a depression in said ring gradually increasing in depth from one end to the other, and a clamping member rotatable relative to the ring, there being a stud on said clamping member arranged to operate on the bottom of said depression to clamp the ring against the back end of the box.

9. A dust-guard for car journal-boxes comprising a packing-ring to encircle the journal, there being oppositely-disposed depressions` in one side of said ring each gradually increasing in depth from one end to the other, and a clamping member rotatable relative to the ring, there being studs on said clamping member arranged to operate on the bottom of said depressions to clamp the ring against the back end of the box.

l0. A dust-guard for car j ournal-boxes comprising a packing-ring to encircle the journal, there being a depression in said ring gradually increasing in depth from one end to the other, a clamping member rotatable relative to the ring, there being a stud on said clamping member arranged to operate on the bottom of said depression, and means acting on the clamping member to impart thereto a constant tendency to rotate and thereby clamp the ring against the back of the box.

11. A dust-guard for car j ournal-boxes comprising a divided ring to encircle the journal, there being a wall on said ring eccentric to the center oi' the ring, and a clamping member rotatable relative to the ring, there being a stud on the clamping member arranged to operate against said wall to tighten the ring on the journal.

l2. A dust-guard for car j ournal-boxes comprising a divided ring to encircle the journal, there being oppositely-disposed Walls on one side of said ring each eccentric to the center of the ring, and a clamping member rotatable relative to the ring, there being studs on the clamping member arranged to operate against said eccentric walls to tighten the ring on the journal.

13. A dust-guard for car j ournal-boxes comprising a divided ring to encircle the journal, there being a wall on said ring eccentric to the center ofthe ring, a clamping member rotatable relative to the ring, there being a stud on said member arranged to operate against said eccentric wall, and means con stantly acting on the clamping member to impart thereto a tendency to rotate and thereby tighten the ring on the journal.

lOO

14. A'dust-guard for car journal-boxes comprising a divided' ring to vencircle the y 'journal, `there being oppositely-disposed eccomprising a divided ring, there being bearings on one side of said ring formed by'depressions in the ring each deeperat -one end i 2oy than at the other andeach provided with an inner Wall eccentric to the center of they ring,

and a clamping member rotatable relative to the ring, there being studs on the clamping member arranged to operate against the bot.- tom and inner Wall vof the bearingsto simulf taneously clamp the ring lin place on the jour- 25 pressions in the ring, each deeper at one end nal and against the back end ofthe box.

16. A dust-guard 'for car journal-boxes i comprising adivided ring, there being bear-v ings on one side ofsaid ringformed by'dethanatthe other end and 'each provided with an inner Wall eccentric to the center of the i ring, a clamping member rotatable'relative 3o to the ring, there being studs on the clamp- 'ing member arranged to operateagainst the v ling member onthe journal.

bottom and inner Wall of -the bearings, and

means constantlyacting on the clamping member to impart thereto a tendency to ro-` tate and clamp the ring on the journal and against the back end of the box.

17. A dust-.guard for car journal-bones comprising a ring to encircle the journal,

there being eccentric bearings `on said ring, a'

clamping member rotatable relative to the ring, there being studs on the clamping member to operatel on said bearings, and .out- Wardly-projecting ears on sald clamping Lio member, and sprln s operating on said ears to :impart to thec amping member a constant tendency to rotate. v18. A vdust-guard for car :journal-boxes comprising a divided ring 'to encircle the 'i journal, there being eccentric bearings on said ring, a clamping member rotatable relative to the ring, there being-studs on said clamping member to operate onsaid bearings,

and outwardly-,projecting ears on the clamping member, springs operating onsaid ears to impart to the clamping member a constant tendency to rotate, and means for preventing backward movementof GEORGE ALVERADO WOODMAN. y `VVitnesses':

' WM. O. BELT,

M. A. KIDDIE.

the cl amp- 

